51 some very useful subprogram has a very good suggestion

usbn9603等时传输的firmware-usbn9603 such as the transmission of the firmware

51单片机虚拟串口,解决只有P3.0/P3.1单串口的不足-51 single-chip virtual serial port, serial port solution is only the inadequacy of single-P3.0/P3.1

本系统采用MSC-51系列单片机ATSC51和可编程并行I/O接口芯片8255A为中心器件来设计交通灯控制器，实现了能根据实际车流量通过8051芯片的P1口设置红、绿灯燃亮时间的功能；红绿灯循环点亮，倒计时剩5秒时黄灯闪烁警示（交通灯信号通过PA口输出，显示时间直接通过8255的PC口输出至双位数码管）；车辆闯红灯报警；绿灯时间可检测车流量并可通过双位数码管显示。本系统实用性强、操作简单、扩展功能强。 -The system uses MSC-51 series single-chip ATSC51 and programmable parallel I/O interface chip 8255A-centric device designed to control traffic lights, can be achieved in accordance with the actual traffic flow through the P1 port 8051 chip set red, green fuel Liang function of time traffic light cycle, the countdown five seconds left when the yellow light flashing warning (traffic lights through the PA output signal indicates the time directly through the PC port output 8255 to double-digits) vehicle alarm闯红灯 green time traffic flow can be detected through a double-digital display. The system practical, simple and strong extensions.

实验名称：看门狗实验 功能描述：使能系统看门狗。 如果将PA0连接到LED上观察到实验现象为LED灯闪烁。 如果连接到SPK上将会听到SPK间歇性鸣叫。 如果将watchdog_init() 注释掉或者将WDT_off() 前面的注释去掉则将看门狗禁止 此时连接到LED上观察到的现象为LED常亮 实验目的：熟悉看门狗的操作 实验说明：MCU--M16 外部7.3728M晶振 -AVR for Watchdog!

51单片机收发短信的程序，W77e58单片机外括16kram就行-51 SCM SMS procedures, including W77e58 SCM 16kram on foreign firms

用ATmega8单片机产生占空比可变PWM方波-ATmega8 generated by single-chip PWM variable duty cycle square wave

AT45D041大容量IC卡 读写程序,不知现在还有没人用，以前我用过的一颗芯片。-AT45D041 large-capacity IC card reading and writing process, I wonder if there is no one now, and I used a single chip.

i2c总线对于单片机的扩展很有帮助, 可以通过两个i/o口进行大量的扩张. 这是一个i/c的应用程序.-i2c Bus for the expansion of SCM helpful, through two i/o Hau substantial expansion. This is an i/c applications.

医疗设备开发原代码5 医疗设备开发原代码5-Medical equipment, the development of the original code 5, the original code to develop medical equipment 5

时钟PCF8563的51程序,调试过,可以用.-Clock PCF8563 51 procedures, debugging, and can be used.